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do_generic_syscall: Even if the system call is normal, if errno is not zero, it returns an error. (TEMP_FIX_75)

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This commit is contained in:
Tomoki Shirasawa
2018-02-03 21:37:12 +09:00
parent a9dfcd9a89
commit 748429fc92
1 changed files with 0 additions and 9 deletions
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9
executer/user/mcexec.c
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@ -2533,20 +2533,11 @@ do_generic_syscall(
__dprintf("do_generic_syscall(%ld)\n", w->sr.number);
#ifdef POSTK_DEBUG_TEMP_FIX_75 /* syscall return value check add. */
ret = syscall(w->sr.number, w->sr.args[0], w->sr.args[1], w->sr.args[2],
w->sr.args[3], w->sr.args[4], w->sr.args[5]);
if (ret == -1) {
ret = -errno;
}
#else /* POSTK_DEBUG_TEMP_FIX_75 */
errno = 0;
ret = syscall(w->sr.number, w->sr.args[0], w->sr.args[1], w->sr.args[2],
w->sr.args[3], w->sr.args[4], w->sr.args[5]);
if (errno != 0) {
ret = -errno;
}
#endif /* POSTK_DEBUG_TEMP_FIX_75 */
/* Overlayfs /sys/X directory lseek() problem work around */
if (w->sr.number == __NR_lseek && ret == -EINVAL) {